David dedication to the Angus breed began in 1952, with his first purchase of Angus cattle. He established the Cedar Hills Ranch, south of Dallas, Texas. He was a pioneer in Artificial Insemination and computerized selective breeding. He was actively involved in the latest innovations and research projects with Texas A&M ,Oklahoma State, U of AZ and Colorado State University.
In 1980, David and Emma expanding their cattle operation by bringing 54 Angus Heifers from Texas to establish the Tybar ranch outside of Carbondale, Colorado. In 1983, David joined the Colorado State University (CSU) project researching the cause and prevention of pulmonary hypertension or high altitude stress, aka ‘brisket disease in cattle. Under the pilot program designed by Professor James Brinks the cattle were evaluated for Pulmonary Arterial Pressure (PAP) around one year of age. The evaluation involved a lung-heart catheterization to record the pressures in the lungs and heart and to assign a numerical score for the tendency of elevated hypertension. The lower the score the lower the risk of developing high altitude distress and eventual heart failure. This condition is found in all breed of cattle raised in elevations greater than 5000 feet. Affected animals show signs of an enlarged brisket due to the increased fluid accumulating around the heart and collecting in the chest cavity hence the misnomer ‘brisket disease’.
In short order it was apparent that the collection of these scores provided a new and exciting tool for sire selection for the seed stock producer as well as well as the registered and commercial herdsmen. Continuing monitoring the genetic progress under Dr. James Brinks and Dr. Mark Enns, the Tybar herd’s findings were calibrated by CSU graduate students and a reliable scoring system was established.
Dr. Tim Holt, DVM, continues this research by testing beef cattle across the nation. The data is analyzed by the CSU Department of Animal Science’s Center for Genetic Evaluation of Livestock. The condition is caused by hypertrophy of the right ventricle of the heart resulting from pulmonary hypertension, leading to a shortage of oxygen. The availability of oxygen is 17% less at 5,000 feet that at sea level; 20% less at 6,000 feet, 26% less at
8000 feet and 31% less at 10,000 feet. Oxygen shortage at high elevation causes increased resistance to blood flow in the small arteries of the lungs.
The heart compensates for the higher resistance by stretching and building up more pressure. The pressure can continue to build up leading to fluid accumulation around the heart and eventually collecting in the chest cavity. i.e. brisket in large animals with the end result being heart failure. The resulting hypertension in cattle is not unlike that in humans . Further more this is a heritable trait not a ‘disease’.
Relying on this research and careful selection for positive genetic traits, using Artificial Insemination and advanced PAP data, Danciger Tybar Angus Ranch maintains a 250 registered herd with known genetic history.
Danciger Tybar Angus Ranch,under the direction of Emma Danciger and staff, remain one of the premier PAP-tested Angus Seed stock providers adhering to the philosophy of excellence and David’ goal to provide “GENES THAT FIT’